Water → 4-(4-Benzo[b]thiophen-4-yl-piperazin-1-yl)butyl acetate
Reaction equation
Cl.[S:2]1[CH:6]=[CH:5][C:4]2[C:7]([N:11]3[CH2:16][CH2:15][NH:14][CH2:13][CH2:12]3)=[CH:8][CH:9]=[CH:10][C:3]1=2.C(=O)([O-])[O-].[K+].[K+].[C:23]([O:26][CH2:27][CH2:28][CH2:29][CH2:30]Br)(=[O:25])[CH3:24].O>CN(C)C=O>[C:23]([O:26][CH2:27][CH2:28][CH2:29][CH2:30][N:14]1[CH2:15][CH2:16][N:11]([C:7]2[C:4]3[CH:5]=[CH:6][S:2][C:3]=3[CH:10]=[CH:9][CH:8]=2)[CH2:12][CH2:13]1)(=[O:25])[CH3:24]Participants
Reactant 4
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 80 °C
Procedure
1.0 g (3.9 mmol) of 1-Benzo[b]thiophen-4-yl-piperazine hydrochloride was suspended in 20 ml of dimethylformamide (DMF), and potassium carbonate (1.3 g, 9.4 mmol) and 4-bromobutyl acetate (0.7 ml, 4.8 mmol) were added thereto followed by stirring at 80° C. for 6 hours. The reaction mixture was cooled to room temperature, then water was added thereto and the resulting mixture was extracted with ethyl acetate. The organic phase was washed with water, dried over magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (methylene chloride:methanol=30:1), then concentrated under reduced pressure to obtain 4-(4-benzo[b]thiophen-4-yl-piperazin-1-yl)butyl acetate (0.72 g) as light yellow oil.
Workup
- temperatureThe reaction mixture was cooled to room temperature
- extractionthe resulting mixture was extracted with ethyl acetate
- washThe organic phase was washed with water
- dry with materialdried over magnesium sulfate
- concentrationconcentrated under reduced pressure
- customThe residue was purified by silica gel column chromatography (methylene chloride:methanol=30:1)
- concentrationconcentrated under reduced pressure
Sources & evidence
- ORD record
- ord-b414e3011eef4d1699dd2c3a2b775624
- Source dataset
- uspto-grants-2013_01
- Patent number
- US08349840B2
Reaction notes
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